JPH0877902A - Current condition detector - Google Patents
Current condition detectorInfo
- Publication number
- JPH0877902A JPH0877902A JP6239473A JP23947394A JPH0877902A JP H0877902 A JPH0877902 A JP H0877902A JP 6239473 A JP6239473 A JP 6239473A JP 23947394 A JP23947394 A JP 23947394A JP H0877902 A JPH0877902 A JP H0877902A
- Authority
- JP
- Japan
- Prior art keywords
- current
- relay
- diode
- terminals
- connection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 1
Landscapes
- Relay Circuits (AREA)
- Electronic Switches (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、水力発電所等の電力設
備において保護リレーを使用し遮断器や閉塞リレーを動
作させる電流回路の電流条件検出装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current condition detecting device for a current circuit that uses a protection relay to operate a breaker or a blocking relay in a power facility such as a hydroelectric power plant.
【０００２】[0002]
【従来の技術】従来の電流条件検出装置の一例を図４に
示す。これは、保護リレーの動作によって遮断器４をト
リップさせる回路であり、保護リレー接点１と、保護リ
レー動作検出用の電流リレー２と、遮断器トリップコイ
ル３と、遮断器の動作と連動する遮断器補助接点３Ａと
を直列に接続してある。電流リレー２は、保護リレーの
動作を検出し、別に設ける警報器や表示器にその接点を
用いる。2. Description of the Related Art FIG. 4 shows an example of a conventional current condition detecting device. This is a circuit that trips the circuit breaker 4 by the operation of the protection relay, and includes the protection relay contact 1, the current relay 2 for detecting the protection relay operation, the circuit breaker trip coil 3, and the circuit breaker that operates in conjunction with the operation of the circuit breaker. The auxiliary contact 3A is connected in series. The current relay 2 detects the operation of the protection relay and uses its contacts for a separately provided alarm device or display device.
【０００３】この構成で保護リレー接点１が閉動作する
と、遮断器トリップコイル３が励磁され、遮断器４がト
リップ動作する。そうすると、遮断器主極接点と連動す
る遮断器補助接点３Ａが開き、回路は短時間で開とな
る。これによって電流リレー２は短時間励磁され、警報
器や表示器を動作させる。When the protective relay contact 1 is closed in this configuration, the circuit breaker trip coil 3 is excited and the circuit breaker 4 trips. Then, the circuit breaker auxiliary contact 3A interlocked with the circuit breaker main pole contact opens, and the circuit opens in a short time. As a result, the current relay 2 is excited for a short time, and the alarm device and the display device are operated.
【０００４】以上は動作対象として遮断器を例示した
が、このような電流条件検出装置は保護用閉塞リレーに
も一般的に用いられる。Although the circuit breaker has been illustrated as the operation target in the above, such a current condition detecting device is generally used also for a protection blocking relay.
【０００５】[0005]
【発明が解決しようとする課題】このような電流条件検
出装置において、その検出回路を流れる電流は動作対象
のコイル抵抗によって決定され、通常 ０．２〜１０Ａ
程度と広い幅がある。そのため、保護リレー動作検出
用の電流リレーは動作対象ごとにコイル定格を選定しな
ければならない。In such a current condition detecting device, the current flowing through the detecting circuit is determined by the coil resistance of the operation target, and is usually 0.2 to 10 A.
There is a wide range of degrees. Therefore, the current relay for detecting the protection relay operation must select the coil rating for each operation target.
【０００６】また、一般的な電圧動作型の補助リレーと
比較すると大きな電流を扱うため、小形化しにくい。そ
のため、近年小形化する配電盤内に収納する場合にスペ
ース面で問題となっている。Further, compared to a general voltage-operated type auxiliary relay, it handles a large current, so that it is difficult to miniaturize it. Therefore, there is a problem in terms of space when it is housed in a switchboard which is becoming smaller in size in recent years.
【０００７】そこで本発明は、電流リレーのコイル定格
不適合の起こる可能性が低く、また、取付けスペースが
小さい電流条件検出装置を提供することを目的とする。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a current condition detecting device which is less likely to cause a coil rating mismatch of a current relay and has a small mounting space.
【０００８】[0008]
【課題を解決するための手段】本発明の電流条件検出装
置は、１個または複数個のダイオードを直列に接続して
なるダイオード列と、このダイオード列の両端子間に接
続した光結合素子とを備えた構成とする。SUMMARY OF THE INVENTION A current condition detecting device according to the present invention comprises a diode array in which one or a plurality of diodes are connected in series, and an optical coupling element connected between both terminals of the diode array. Is provided.
【０００９】[0009]
【作用】本発明の電流条件検出装置においては、ダイオ
ード列に流れる電流によりダイオード列の両端に発生す
る電圧によって光結合素子の一次側の発光素子を発光さ
せ、二次側のスイッチング素子を動作させる。In the current condition detecting device of the present invention, the light emitting element on the primary side of the optical coupling element is caused to emit light by the voltage generated across the diode row by the current flowing through the diode row, and the switching element on the secondary side is operated. .
【００１０】ダイオードの順電圧特性は非線形であり、
電流が大きく変化しても電圧の変化は小さいので、同一
のダイオード列で広範囲の電流入力に対応できる。The forward voltage characteristic of a diode is non-linear,
Since the change in voltage is small even if the current changes significantly, the same diode array can be used for a wide range of current inputs.
【００１１】また、ダイオードは順方向過電流耐量が大
きいので、その定格を小さく選定でき、装置を小形化す
ることができる。Further, since the diode has a large forward current resistance, the rating can be selected small and the device can be miniaturized.
【００１２】[0012]
【実施例】以下本発明の一実施例を、図１、図２、図３
を参照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
Will be described with reference to.
【００１３】本実施例の電流条件検出装置は、図１に示
すように、１個または複数個のダイオードを直列に接続
してなり電流入力端子９１，９２間に接続されたダイオ
ード列５と、このダイオード列５の両端子間に並列に接
続した逆接続保護用ダイオード６と、この逆接続保護用
ダイオード６の両端子間に電流制限抵抗８を介して接続
したフォトモスリレー７よりなる。フォトモスリレー７
は一次側の発光素子７１と二次側のスイッチング素子７
２よりなり、スイッチング素子７２は出力端子１０を有
する。As shown in FIG. 1, the current condition detecting device according to the present embodiment includes a diode string 5 in which one or a plurality of diodes are connected in series and connected between current input terminals 91 and 92, It comprises a reverse connection protection diode 6 connected in parallel between both terminals of this diode array 5, and a photo-mos relay 7 connected between both terminals of this reverse connection protection diode 6 via a current limiting resistor 8. Photo mos relay 7
Is a light emitting element 71 on the primary side and a switching element 7 on the secondary side.
2 and the switching element 72 has an output terminal 10.
【００１４】このように構成した本実施例の電流条件検
出装置においては、電流入力端子９１，９２間に電流が
流れると、ダイオード列５の両端子間に電圧が発生し、
フォトモスリレー７の一次側の発光素子７１を発光させ
る。スイッチング素子７２はこの光を受けて導通し、出
力端子１０が短絡状態となる。すなわち、フォトモスリ
レー７は、電磁式リレーの接点が閉じたのと同じ状態に
なる。この動作は電磁式リレーよりも高速で行なわれ
る。In the current condition detecting device of the present embodiment constructed as above, when a current flows between the current input terminals 91 and 92, a voltage is generated between both terminals of the diode array 5,
The light emitting element 71 on the primary side of the photomos relay 7 is caused to emit light. The switching element 72 receives the light and becomes conductive, and the output terminal 10 is short-circuited. That is, the photomos relay 7 is in the same state as when the contacts of the electromagnetic relay are closed. This operation is performed faster than the electromagnetic relay.
【００１５】ダイオードに順方向に電流が流れると、そ
の内部抵抗によってダイオードの両端には電圧が発生す
る。ダイオードを複数個直列に接続することにより、フ
ォトモスリレーを動作させるに十分な電圧が発生する。
これによりフォトモスリレーは動作し、出力である二次
側がＯＮとなる。When a current flows through the diode in the forward direction, a voltage is generated across the diode due to its internal resistance. By connecting a plurality of diodes in series, a voltage sufficient to operate the photoMOS relay is generated.
As a result, the photo MOS relay operates and the secondary side, which is an output, is turned on.
【００１６】このとき、ダイオードの両端には電流に対
して図２に示すような非線形の特性で電圧が発生する。
これは、電流の大きさの変化に対して電圧の変化は非常
に小さい特性となっている。したがって、広い電流入力
範囲に対応することができる。 また、ダイオードの順
方向過電流特性は、サージ電流特性として示されるが、
これは図３に示すようになっており、短時間であればほ
ぼ１０倍程度の電流が流せる。これにより、小さい定格
のダイオードを使用することができ、装置を小形化する
ことができる。At this time, a voltage is generated across the diode with a non-linear characteristic as shown in FIG. 2 with respect to the current.
This has a characteristic that the change in voltage is very small with respect to the change in current magnitude. Therefore, a wide current input range can be accommodated. The forward overcurrent characteristic of the diode is shown as a surge current characteristic,
This is as shown in FIG. 3, and a current of about 10 times can flow in a short time. This allows the use of smaller rated diodes, which allows the device to be miniaturized.
【００１７】[0017]
【発明の効果】以上のように本発明の電流条件検出装置
によれば、動作対象機器によらず電流回路の動作検出を
行なうことができ、電流リレーの定格を誤って適用する
という不適合がなくなる。また本装置は静的に動作する
回路部品によって構成されるので、密度高く実装するこ
とができる。As described above, according to the current condition detecting device of the present invention, the operation of the current circuit can be detected regardless of the device to be operated, and the incompatibility of erroneously applying the rating of the current relay is eliminated. . Further, since this device is composed of statically operating circuit components, it can be mounted with high density.
【図１】本発明の実施例の電流条件検出装置の回路図FIG. 1 is a circuit diagram of a current condition detection device according to an embodiment of the present invention.
【図２】ダイオードの順方向電流電圧特性を例示する図FIG. 2 is a diagram illustrating a forward current-voltage characteristic of a diode.
【図３】ダイオードの順方向過電流特性を例示する図FIG. 3 is a diagram illustrating a forward overcurrent characteristic of a diode.
【図４】従来の電流条件検出装置の回路図FIG. 4 is a circuit diagram of a conventional current condition detection device.
１・・保護リレー接点 ２・・電流リレ
ー ３・・遮断器トリップコイル ３Ａ・・遮断器
補助接点 ４・・遮断器 ５・・ダイオー
ド列 ６・・逆接続保護用ダイオード ７・・フォトモ
スリレー ７１・・発光素子 ７２・・スイッ
チング素子 ８・・電流制限抵抗 ９１，９２・・
電流入力端子 １０・・出力端子1-Protection relay contact 2-Current relay 3-Breaker trip coil 3A-Breaker breaker auxiliary contact 4-Breaker 5-Diode array 6-Reverse connection protection diode 7-Photomos relay 71 ..Light emitting element 72..Switching element 8..Current limiting resistor 91,92 ..
Current input terminal 10 ... Output terminal
Claims (1)
接続してなるダイオード列と、このダイオード列の両端
子間に接続した光結合素子とを備えたことを特徴とする
電流条件検出装置。1. A current condition detecting device comprising: a diode array including one or a plurality of diodes connected in series; and an optical coupling element connected between both terminals of the diode array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6239473A JPH0877902A (en) | 1994-09-07 | 1994-09-07 | Current condition detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6239473A JPH0877902A (en) | 1994-09-07 | 1994-09-07 | Current condition detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0877902A true JPH0877902A (en) | 1996-03-22 |
Family
ID=17045298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6239473A Pending JPH0877902A (en) | 1994-09-07 | 1994-09-07 | Current condition detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0877902A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1152247A3 (en) * | 2000-05-05 | 2003-06-25 | Alcatel | Multiple phase detector |
| WO2017001519A1 (en) * | 2015-06-29 | 2017-01-05 | Eaton Industries (Netherlands) B.V. | Optocoupler driver circuit |
| CN109828140A (en) * | 2019-02-15 | 2019-05-31 | 杭州老板电器股份有限公司 | Electric current value calculating method, device and electronic equipment |
-
1994
- 1994-09-07 JP JP6239473A patent/JPH0877902A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1152247A3 (en) * | 2000-05-05 | 2003-06-25 | Alcatel | Multiple phase detector |
| WO2017001519A1 (en) * | 2015-06-29 | 2017-01-05 | Eaton Industries (Netherlands) B.V. | Optocoupler driver circuit |
| CN109828140A (en) * | 2019-02-15 | 2019-05-31 | 杭州老板电器股份有限公司 | Electric current value calculating method, device and electronic equipment |
| CN109828140B (en) * | 2019-02-15 | 2021-09-24 | 杭州老板电器股份有限公司 | Current value calculation method and device and electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20040727 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20041124 |